18-GJ89D1-1F-EN
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Filters
Table 26. Filter Considerations
• A filter must be installed within the system.
• A filter channel is provided in the unit at the bottom of the Blower/
Filter compartment.
• For customer ease of filter maintenance, it is recommended that a
properly sized remote filter grill(s) be installed for units that are
difficult to access. Airflow should not exceed the maximum rated
velocity of the filter being used.
Table 27. Filter Sizes
Cabinet Size * A B C
Filter Size 16 x 20 20 x 20 22 x 20
* Cabinet size is indicated by the 7th digit in model number.
Filter in
air handler cabinet
(Upflow
Application)
Block off
plate
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